化学钝化：将制件放在含有氧化剂的溶液中处理，使表面形成一层很薄的钝态保护膜的过程。
Chemical passivation: will contain antioxidant parts in solution in processing, make the surface to form a thin film of the state of the process. Blunt.
研究了在铜合金表面电镀纯铜层保护膜对铜合金引线框架氧化失效的影响。
The effects of surface electroplate pure copper on oxidation failure of lead frame copper alloys for IC package were investigated.
活泉中含有的天然二氧化硅能在肌肤表面形成一层可透气的保护膜。
Natural SiO2 of mineral water can form a layer of protection membrane on the surface of the skin.
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